ASTM Sports Flooring Standard

In areas designated for sports and recreation, it is important to judge a floor by the characteristics that optimize it for physical activities. This is where ASTM F2772 comes in. ASTM F2772 measures four key factors regarding safety and suitability for sports activities. These factors are: force reduction, surface finish effect (also called “friction”), ball rebound and vertical deformation. Each parameter provides valuable information for selecting a sports/recreational flooring system. Systems that can be tested under ASTM F2772 are: area elastic (wood systems), point elastic (synthetic systems), and combi-elastic (systems combining area elastic and point elastic construction).

Force Reduction

Force reduction (also called “shock absorption”) evaluates a surface’s ability to reduce impact force. This predominantly relates to impacts generated by lower extremities, for example an athlete running. Force reduction is tested according to ASTM F2569 and it indicates the degree of attenuation provided by the surface in response to certain movements. ASTM F2772 arranges degrees of force reduction into five classes, to assist in determining the appropriate level for specific sports and/or other activities. ASTM F2772 also establishes a minimum value of 10% force reduction for any floor space designed for indoor athletics or physical recreation.

Ball Rebound

Ball rebound (also called ball bounce) is a mechanical property that determines a surface’s suitability for basketball. It is tested according to ASTM F2117 and accounts for two parameters: performance level (average performance of test points must reach a minimum of 90%) and uniformity level (test point deviation cannot exceed 3% of the average of all tests). Ball rebound is based on the responsiveness of a ball and its interaction with the surface. It is calculated by comparing the ball’s rebound height on the sports surface to the rebound height of the same ball on concrete. The result is expressed as a percentage. The uniformity requirement ensures consistent ball bounce throughout the flooring system. This particular testing methodology is specific to basketballs, but may offer useful information for other inflated balls that come into contact with the flooring’s surface as well.